You will need to provide a good quality image of the chart for your developer. You can provide this in digitised form, or in a form suitable for digitisation. Hand-drawn sketches are not suitable.
Your CAL developer needs to know the number of points to be plotted, the coordinates of the points to be plotted, the accuracy required of the student, and the labels required on the axes.
For the example on the previous page, your script should read:
applet type = linear chart
numPoints = 3
point0 = 0,3.6
point1 = 6,4.1
point2 =33,6.6
roundTo = 1.0,0.5
measurement ="weeks,weeks,Kg"
The "numPoints" is the number of points to be plotted. The "point0" etc are the x-y co-ordinates of the points to be plotted.
The "roundTo" value specifies the accuracy required when plotting points. The 0.5 value means that the value plotted by the student is rounded to the nearest 0.5 value, i.e. if the plotted value was (4.7,7.3), this would be rounded to (5.0,7.5) with the "roundTo" values specified above.
The "measurement" value specifies the type of measurement and the labels for the axes. For example, if the "measurement" value was "head,weeks,kg", the message displayed by the chart may be "Plot the following head measurement on the graph: 18.0weeks, 41cm.". The x-axis would be labelled "weeks" and the y-axis would be labelled "cm".
Remember, you can plot any number of points in the graph.